https://hdl.handle.net/20.500.12724/20562 2026-05-13T08:37:57Z 2026-05-13T08:37:57Z Machuca de Pina, Juan Manuel Gonzalez Feliu, Jesus Chong, Mario https://hdl.handle.net/20.500.12724/24456 2026-04-17T00:36:36Z 2025-01-01T00:00:00Z

Goal programming vehicle routing for heterogeneous beverage distribution in a megacity: a case study from Lima and its implications Machuca de Pina, Juan Manuel; Gonzalez Feliu, Jesus; Chong, Mario Urban freight transportation is part of a complex system where goods move continuously from origin to destination in perfect orchestration. Beverage transport is essential in urban logistics since it is related to the excellent operability of the Ho.Re.Ca. Sector. This paper proposes to model the complex beverage distribution system of a company in a megacity, facing the challenge of considering many heterogeneous elements and optimizing them in a new solution. First, a goal programming modeling approach is proposed, defining the application field's main goals and hypotheses. Second, a solving method based on an MIP model in a commercial solver is defined. Then, a scenario generation-assessment procedure for Lima conurbation is proposed, defining a set of instances with 10–200 customers and solving them. Results show that the proposed framework can solve to optimality real-life instances up to 40 customers and gives acceptable solutions in terms of gap in real-life instances up to 120 customers, which reflects the complexity of the beverage distribution reality and shows the method's suitability to support both company's operations and urban territorial development in megacities, showing how efficiency and be increased and supporting decisions in terms of vehicle or organization changes in beverage distribution.

2025-01-01T00:00:00Z Chasquibol Silva, Nancy Ascención Sotelo Contreras, Axel Alexandre Tapia Chasquibol, Mateo Paredes Llosa, Yeromi Coral Sajid, A. Sahin, S. Wu, M. Goycoolea, F. M. https://hdl.handle.net/20.500.12724/24455 2026-04-17T00:36:36Z 2025-01-01T00:00:00Z

Extraction and characterization of cushuro (Nostoc sphaericum) polysaccharides Chasquibol Silva, Nancy Ascención; Sotelo Contreras, Axel Alexandre; Tapia Chasquibol, Mateo; Paredes Llosa, Yeromi Coral; Sajid, A.; Sahin, S.; Wu, M.; Goycoolea, F. M. Cushuro (Nostoc sphaericum) is a blue-green edible freshwater microalgae of ancestral use as a traditional food in the Andean regions of Peru. Knowledge of the extraction process conditions and characteristics of cushuro biomass polysaccharides are instrumental to expand its range of applications and appraise its potential utilization as a hydrocolloid ingredient in food and other applications. Polysaccharides acid extract (PCAcE) and polysaccharides aqueous extract (PCAqE) with hot water at 90 °C were extracted from cushuro (Nostoc sphaericum) biomass collected from the Department of Ancash, Peru. PCAcE showed higher extraction yield (49.0 ± 0.5 %), purity (83.3 ± 0.3 %), emulsifying capacity (55.6 ± 1.0 %), foaming capacity (8.3 ± 0.3 %), water holding capacity (3.0 ± 0.11 g/g) and DPPH radical scavenging activity (73.0 %) than PCAqE. Also, FTIR spectra showed a typical polysaccharides’ fingerprint. PCAcE showed a Mw of 1.0 ± 0.4 × 105 Da, dispersity index (Ð) of 3.5 ± 0.4, radius of gyration (Rg) of 22 ± 5 nm and a branched-type conformation, characterized by multi-detection HPSEC. The monosaccharide composition of PCAcE consisted mainly of glucose, xylose and galactose, and lower amounts of rhamnose. The rheological properties in aqueous solution, investigated under sensitive small-deformation oscillatory rheometric, revealed that the polysaccharide acidic extract (PCAcE) showed “weak gel” properties, unexpected on a typical highly branched polysaccharide. These results suggest potential applications of cushuro (Nostoc sphaericum) polysaccharides as a viscosity enhancer and natural emulsifier to stabilize oil-water emulsions in foods and other applications.

2025-01-01T00:00:00Z Montes Cabrera, Abdel Farid Gherardi Jimenez, Flavia Quiroz Flores, Juan Carlos https://hdl.handle.net/20.500.12724/24444 2026-04-17T00:36:36Z 2025-01-01T00:00:00Z

Enhancing Service Efficiency in Peruvian Automotive Workshops through the Integration of SMED, KANBAN, and TPM: A Lean-Based Empirical Study Montes Cabrera, Abdel Farid; Gherardi Jimenez, Flavia; Quiroz Flores, Juan Carlos The automotive industry in Peru is a key sector of the economy, with steady growth in vehicle sales, leading to increased demand for maintenance services. However, auto repair shops face critical challenges such as delivery delays, post-service complaints, and inefficient resource management due to unplanned mechanical failures, prolonged setup times, and stockout issues. This study proposes a model based on TPM, SMED, and Kanban. TPM, through preventive and autonomous maintenance, aims to reduce unplanned failures and increase equipment availability. SMED addresses the reduction of setup times by standardizing processes. Kanban improves inventory management using boards and cards that optimize turnover and reduce stockouts. Simulations were conducted using Arena software, and statistical validations, including Kolmogorov-Smirnov and Chi-square tests, were applied to analyze time distributions with Input Analyzer. Kanban was validated through a baseline and improved model using a pilot test with Kanban boards and cards, along with Arena software simulation, while TPM and SMED were evaluated with joint simulations using Input Analyzer, ensuring 95% confidence intervals. The results show an increase in service level from 82.67% to 92.72%, surpassing industry standards and confirming the model’s effectiveness in improving operational efficiency. This approach is replicable and contributes to the competitive development of the automotive sector, enhancing customer satisfaction in repair shops in emerging markets.

2025-01-01T00:00:00Z Carhuas Cuyubamba, Grace Quispe Alvarez, Ariana Quiroz Flores, Juan Carlos https://hdl.handle.net/20.500.12724/24445 2026-04-17T00:36:36Z 2025-01-01T00:00:00Z

Development Of A Storage Management Model Based On Lean Warehousing: A Case Study In A Peruvian SME In The Maintenance Services Sector Carhuas Cuyubamba, Grace; Quispe Alvarez, Ariana; Quiroz Flores, Juan Carlos The maintenance services sector in Peru faces challenges related to inefficient inventory management and logistics operations, affecting service levels. While existing literature explores Lean Warehousing and inventory control techniques, there is limited research on tailored storage management models for small maintenance enterprises in developing economies like Peru. This research addresses this gap by developing a customized storage management model based on Lean Warehousing principles, specifically designed for small enterprises in the Peruvian maintenance sector. The case study implemented tools such as 5S and Kardex systems to optimize warehouse operations. Key results showed a 15% improvement in service level and a reduction of order processing time by 20%. The findings contribute academically by demonstrating the applicability and effectiveness of Lean tools in enhancing operational performance and competitiveness. Socioeconomically, the research supports SMEs in achieving cost reductions and improved service quality. This study calls for further exploration of integrating advanced digitalization techniques in Lean Logistics to enhance efficiency and sustainability in the sector.

2025-01-01T00:00:00Z